unix: Implement datagram sockets

Implement `SOCK_DGRAM` sockets for `AF_UNIX` family.

Change-Id: If3d6f408a7d881635ccf04b080391905fdc94b13
Reviewed-on: https://review.haiku-os.org/c/haiku/+/6617
Reviewed-by: Jérôme Duval <jerome.duval@gmail.com>
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>

unix: accept() shouldn't return B_TIMEOUT but B_WOULD_BLOCK

it's already handled when breaking the loop.

Change-Id: I47aa8105ff32e97aa4e1c0b2e9292e4516ee155a
Reviewed-on: https://review.haiku-os.org/c/haiku/+/6456
Reviewed-by: waddlesplash <waddlesplash@gmail.com>

unix: sendmsg should return EPIPE after close

https://pubs.opengroup.org/onlinepubs/9699919799/functions/sendmsg.html
"[EPIPE] ... the socket is connection-mode and is no longer connected."
Change-Id: I6728b088d2f717b769697218edf26c76c59f488e
Reviewed-on: https://review.haiku-os.org/c/haiku/+/3816
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

unix: get a read event when read-polling a read-shutdown socket

UnixEndpoint::Receivable(): EOF means there is nothing left to read, and
the shutdown happened on the read side or the write side.

also fix x86_64 build with trace

Change-Id: I54c806f0b900591c3d441240b8f6768dfb756bad
Reviewed-on: https://review.haiku-os.org/c/haiku/+/3808
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

TCP, UNIX sockets: allow multiple calls to listen

* Subsequent calls to listen on an already-listening socket can resize
the backlog.
* While not explicitly spelled out by POSIX, this behaviour is
consistent with FreeBSD and Linux.

Fixed up network stack and drivers for x86_64.

* Various compilation fixes.
* Fixes to the FreeBSD compatibility layer (from comparing the x86-
specific bits with the equivalent amd64 sources in FreeBSD).
* Compile all the Ethernet drivers except for sis900 and wb840, these
require a bit more work to fix (will file a ticket soon). Tested
ipro1000 and rtl81xx, no issues.

Replace uses of obsolescent BReference[able] API.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39870 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Fixed destruction order of lock/reference that could lead to access already
deleted memory.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@35467 a95241bf-73f2-0310-859d-f6bbb57e9c96

Patch by Eric Petit: A read select() should not block when there's not data
available anymore and the remote end has been write-shut-down. Fixes #3536.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@30846 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Replaced all instances of benaphores in the kernel code by mutexes.
* Removed kernel benaphores.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25690 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added support for SO_PEERCRED for Unix sockets.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25305 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Support the new {send,read}_data_no_buffer() protocol hooks to avoid
unnecessary data copies and waste of memory.
* Changed the storage backend to ring_buffer.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25300 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added a bit more debug output in UnixFifo, but disabled debug output in
all files by default.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25285 a95241bf-73f2-0310-859d-f6bbb57e9c96

In Shutdown() pass an actual error code to notify(). B_OK is just
ignored. This fixes the hanging OpenSSH "multiplex" test. Save for the
"forwarding" test, which sometimes hangs due to a TCP bug, the complete
test suite passes, now.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25284 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added missing select notifications on shutdown().
* Notify read/write instead of write/error when disconnecting.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25143 a95241bf-73f2-0310-859d-f6bbb57e9c96

For sockets in listening mode the read_avail() apparently has to return
something.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25142 a95241bf-73f2-0310-859d-f6bbb57e9c96

Send() and Receive() select notified the wrong socket about readability
respectively writability.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25069 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added support for SCM_RIGHTS (sending file descriptors).
* Fixed shutdown(). It was computing the wrong fifo flags and set the
wrong ones from the wrong variable on the peer fifo.
* Generally made the Unix sockets behave more like they should. E.g.
after closing one end, it must still be possible to read from the
other (as long as there are buffered data). Also fine-tuned when to
return what errors from recv()/send().


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24943 a95241bf-73f2-0310-859d-f6bbb57e9c96

Resolved TODOs: We now do know whether the call comes from userland or
the kernel.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24919 a95241bf-73f2-0310-859d-f6bbb57e9c96

Protocol module for Unix domain stream type sockets. The implementation
is almost complete, but still quite buggy (receiving data has a good
chance to drop into KDL).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24884 a95241bf-73f2-0310-859d-f6bbb57e9c96

TCP, UNIX sockets: allow multiple calls to listen

* Subsequent calls to listen on an already-listening socket can resize
the backlog.
* While not explicitly spelled out by POSIX, this behaviour is
consistent with FreeBSD and Linux.

Fixed up network stack and drivers for x86_64.

* Various compilation fixes.
* Fixes to the FreeBSD compatibility layer (from comparing the x86-
specific bits with the equivalent amd64 sources in FreeBSD).
* Compile all the Ethernet drivers except for sis900 and wb840, these
require a bit more work to fix (will file a ticket soon). Tested
ipro1000 and rtl81xx, no issues.

Replace uses of obsolescent BReference[able] API.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39870 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Fixed destruction order of lock/reference that could lead to access already
deleted memory.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@35467 a95241bf-73f2-0310-859d-f6bbb57e9c96

Patch by Eric Petit: A read select() should not block when there's not data
available anymore and the remote end has been write-shut-down. Fixes #3536.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@30846 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Replaced all instances of benaphores in the kernel code by mutexes.
* Removed kernel benaphores.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25690 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added support for SO_PEERCRED for Unix sockets.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25305 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Support the new {send,read}_data_no_buffer() protocol hooks to avoid
unnecessary data copies and waste of memory.
* Changed the storage backend to ring_buffer.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25300 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added a bit more debug output in UnixFifo, but disabled debug output in
all files by default.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25285 a95241bf-73f2-0310-859d-f6bbb57e9c96

In Shutdown() pass an actual error code to notify(). B_OK is just
ignored. This fixes the hanging OpenSSH "multiplex" test. Save for the
"forwarding" test, which sometimes hangs due to a TCP bug, the complete
test suite passes, now.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25284 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added missing select notifications on shutdown().
* Notify read/write instead of write/error when disconnecting.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25143 a95241bf-73f2-0310-859d-f6bbb57e9c96

For sockets in listening mode the read_avail() apparently has to return
something.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25142 a95241bf-73f2-0310-859d-f6bbb57e9c96

Send() and Receive() select notified the wrong socket about readability
respectively writability.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25069 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added support for SCM_RIGHTS (sending file descriptors).
* Fixed shutdown(). It was computing the wrong fifo flags and set the
wrong ones from the wrong variable on the peer fifo.
* Generally made the Unix sockets behave more like they should. E.g.
after closing one end, it must still be possible to read from the
other (as long as there are buffered data). Also fine-tuned when to
return what errors from recv()/send().


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24943 a95241bf-73f2-0310-859d-f6bbb57e9c96

Resolved TODOs: We now do know whether the call comes from userland or
the kernel.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24919 a95241bf-73f2-0310-859d-f6bbb57e9c96

Protocol module for Unix domain stream type sockets. The implementation
is almost complete, but still quite buggy (receiving data has a good
chance to drop into KDL).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24884 a95241bf-73f2-0310-859d-f6bbb57e9c96